Abstract：Taking the data in GMD area of south margin of Djungar Basin as an example，the paper expounded the building process of time-depth conversion velocity field. First，the stack velocities are edited by using Lagrangian(datum correction,elimination of anomalous values and increase and interpolation of stack velocity),then，the stack velocities are converted to root-mean-square (rms) velocities by using dip moveout and again are converted to interval velocities by Dix formula. Next，he velocity field is gained by interpolation of interval velocity sections for each line and finally usingthe velocity field to make time-depth conversion，that corrected the distortion of events，resulted in underground accurate structural configuration. The practical application of the method showed that the method of computing the velocity field presented in the paper is reasonable.It's worth mentioning when the interpolation of velocity field is implemented，the change of structures must be considered besides using logging data for constraint , that can gain more accurate velocity field.
何诚, 袁勇, 游文秀, 唐晓雪, 杨帆. 高陡复杂区速度研究及应用[J]. 石油地球物理勘探, 2004, 39(3): 300-303.
He Cheng, Yuan Yong, Yu Wen-xiou, Tang Xiao-xue, Yang Fan. Study of Velocity in Highly-Steep Complex Area and Application. OGP, 2004, 39(3): 300-303.
